<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: zhangyajun <448901948@qq.com>
// +----------------------------------------------------------------------

namespace think\paginator\driver;

use think\Paginator;

class Bootstrap extends Paginator
{
    // public $last;
    // public $first;

    /**
     * 上一页按钮
     * @param string $text
     * @return string
     */
    protected function getPreviousButton($text = "前三页")
    {
        // 错误的如果有页面渲染 在需要这个
       if ($this->currentPage() <= 1) {
            return $this->getDisabledTextWrapper($text);
        }
        $url = $this->url(
            $this->currentPage() - 1
        );

        return $this->getPageLinkWrapper($url, $text);
    }
    /**
     * 下一页按钮
     * @param string $text
     * @return string
     */
    protected function getNextButton($text = '后三页')
    {
        // 错误的如果有页面渲染 在需要这个
         if (!$this->hasMore) {
            return $this->getDisabledTextWrapper($text);
        }
        $url = $this->url($this->currentPage() + 1);

        return $this->getPageLinkWrapper($url, $text);
    }

    /**
     * 页码按钮
     * @return string
     */
    protected function getLinks()
    {
        if ($this->simple) {
            return '';
        }

        $block = [
            'first'  => null,
            'slider' => null,
            'last'   => null,
        ];

        $side   = 1;
        $window = $side * 1;

        if ($this->lastPage < $window + 3) {
            $block['first'] = $this->getUrlRange(1, $this->lastPage);
        } elseif ($this->currentPage <= $window) {
            $block['first'] = $this->getUrlRange(1, $window + 2);
            // $block['last']  = $this->getUrlRange($this->lastPage - 1, $this->lastPage);
        } elseif ($this->currentPage > ($this->lastPage - $window)) {
            // $block['first'] = $this->getUrlRange(1, 2);
            $block['last']  = $this->getUrlRange($this->lastPage - ($window + 1), $this->lastPage);
        } else {
            // $block['first']  = $this->getUrlRange(1, 2);
            $block['slider'] = $this->getUrlRange($this->currentPage - $side, $this->currentPage + $side);
            // $block['last']   = $this->getUrlRange($this->lastPage - 1, $this->lastPage);
        }

        $html = '';

        if (is_array($block['first'])) {
            $html .= $this->getUrlLinks($block['first']);
        }

        if (is_array($block['slider'])) {
            $html .= $this->getUrlLinks($block['slider']);
        }

        if (is_array($block['last'])) {
            $html .= $this->getUrlLinks($block['last']);
        }

        return $html;
    }

    /**
     * 渲染分页html
     * @return mixed
     */
    public function render()
    {
        if ($this->hasPages()) {
            if ($this->simple) {
                return sprintf(
                    '<ul class="pagination no-gap p-0 m-0 row">%s %s</ul>',
                    $this->getPreviousButton(),
                    $this->getNextButton()
                );
            } else {
                return sprintf(
                    '<ul class="pagination row no-gap text-center">%s %s %s</ul>',
                    $this->getPreviousButton(),
                    $this->getLinks(),
                    $this->getNextButton()
                );
            }
        }
    }

   
     //总数标签
    protected  function totalshow()
    {
        $totalhtml='<li class="page-item disabled"><a class="page-link">第'.$this->currentPage.'页/共'.$this->lastPage.'页</a></li>';
        return $totalhtml;
    }

    /**
     * 生成一个可点击的按钮
     *
     * @param  string $url
     * @param  int    $page
     * @return string
     */
    protected function getAvailablePageWrapper($url, $page)
    {
        // 原有数据屏蔽
        // $str ='<li class="page-item" onclick="pagelist('.$page.')"><a class="page-link" href="' . htmlentities($url) . '">' . $page . '</a></li>';
        $str = '';
        switch ($page)
        {
            case '&raquo;': 
                $str ='<li class="page-item" onclick="pagelist('.($this->currentPage+1).')"><a class="page-link">' . $page . '</a></li>';
            break;
            case '&laquo;':
                $str ='<li class="page-item" onclick="pagelist('.($this->currentPage-1).')"><a class="page-link">' . $page . '</a></li>';
            break;
            case '前三页':
                if (1 == $this->currentPage)
                {
                     $str ='<li class="page-item cell-3 p-0 m-0"><a class="page-link">' . $page . '</a></li>';
                }
                elseif($this->currentPage < 3)
                {
                    $str ='<li class="page-item cell-3 p-0 m-0" onclick="pagelist(1)"><a class="page-link">' . $page . '</a></li>';
                }
                else
                    $str ='<li class="page-item cell-3 p-0 m-0" onclick="pagelist('.($this->currentPage-3).')"><a class="page-link">' . $page . '</a></li>';
               
            break;
            case '后三页':

                if ($this->lastPage == $this->currentPage)
                {
                    $str ='<li class="page-item cell-3 p-0 m-0"><a class="page-link">' . $page . '</a></li>';
                }
                elseif ($this->lastPage > $this->currentPage)
                {
                    $str ='<li class="page-item cell-3 p-0 m-0" onclick="pagelist('.($this->lastPage).')"><a class="page-link">' . $page . '</a></li>';
                }
                else
                    $str ='<li class="page-item cell-3 p-0 m-0" onclick="pagelist('.($this->currentPage+3).')"><a class="page-link">' . $page . '</a></li>';
            break;
            default:
                $str ='<li class="page-item cell-2 p-0 m-0" onclick="pagelist('.$page.')"><a class="page-link">' . $page . '</a></li>';
            break;
        }
        return $str;
    }

    /**
     * 生成一个禁用的按钮
     *
     * @param  string $text
     * @return string
     */
    protected function getDisabledTextWrapper($text)
    {
        return '<li class="page-item disabled cell-3 p-0 m-0"><a class="page-link">' . $text . '</a></li>';
    }

    /**
     * 生成一个激活的按钮
     *
     * @param  string $text
     * @return string
     */
    protected function getActivePageWrapper($text)
    {
        return '<li class="page-item active cell-2 p-0 m-0"><a class="page-link">' . $text . '</a></li>';
    }

    /**
     * 生成省略号按钮
     *
     * @return string
     */
    protected function getDots()
    {
        return $this->getDisabledTextWrapper('<li class="page-item cell-2"><a class="page-link">...</a></li>');
    }

    /**
     * 批量生成页码按钮.
     *
     * @param  array $urls
     * @return string
     */
    protected function getUrlLinks(array $urls)
    {
        $html = '';

        foreach ($urls as $page => $url) {
            $html .= $this->getPageLinkWrapper($url, $page);
        }

        return $html;
    }

    /**
     * 生成普通页码按钮
     *
     * @param  string $url
     * @param  int    $page
     * @return string
     */
    protected function getPageLinkWrapper($url, $page)
    {
        if ($this->currentPage() == $page) {
            return $this->getActivePageWrapper($page);
        }

        return $this->getAvailablePageWrapper($url, $page);
    }
}
